159609940 has 96 divisors (see below), whose sum is σ = 408844800. Its totient is φ = 51093504.

The previous prime is 159609929. The next prime is 159610001. The reversal of 159609940 is 49906951.

159609940 = 3255² + 3256² + ... + 3269².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473452 + ... + 473788.

It is an arithmetic number, because the mean of its divisors is an integer number (4258800).

Almost surely, 2^159609940 is an apocalyptic number.

159609940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159609940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204422400).

159609940 is an abundant number, since it is smaller than the sum of its proper divisors (249234860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159609940 is a wasteful number, since it uses less digits than its factorization.

159609940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 159609940 is about 12633.6827568211. The cubic root of 159609940 is about 542.4420036113.

The spelling of 159609940 in words is "one hundred fifty-nine million, six hundred nine thousand, nine hundred forty".